Preparation method of heat-insulating ceramic phenolic resin-based gradient composite material

A technology of phenolic resin and composite materials, applied in the field of composite materials, can solve problems such as uncontrollable operation, poor material fluidity, and prone to defects in samples, and achieve the effects of reducing stress, resisting heat flow erosion, and relieving stress concentration

Active Publication Date: 2019-02-19
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because powder molding will be affected by factors such as uneven material weight, poor material fluidity, uncontrollable operation, etc., it will cause samples to be prone to defects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Material preparation: by weight: 0 parts, 5 parts, 10 parts, 15 parts, 20 parts of hollow microspheres, 200 parts, 150 parts, 100 parts, 50 parts, 0 parts of ceramic components, 40 layers of fiber cloth.

[0022] Dissolve 100 parts of boron phenolic resin and 100 parts of alcohol 1:1, and prepare 5 groups. The hollow microspheres and the ceramic components are respectively added therein, and stirred evenly to form a gradient dipping solution. Cut the regular fiber cloth, apply the dipping solution evenly on the fiber cloth to make a prepreg, and let it dry until the viscosity is suitable.

[0023] Cut the prepreg into a regular size, and stack 40 layers according to the order of ceramic components from high to low. Put it in a mold and place it on a hot press machine, and mold it at a temperature of 80°C to 200°C and a pressure of 15MPa to 19MPa to obtain a heat-insulating and ceramizable phenolic resin-based gradient composite material.

Embodiment 2

[0025] With embodiment 1.

[0026] Weighing and trimming the prepared sample of a kind of anti-heat insulation and ceramizable phenolic resin-based gradient composite material, cut it into a regular cube, and then measured the length, width and height of the material, and obtained a density of 1.1g / cm 3 .

Embodiment 3

[0028] With embodiment 1.

[0029] Using electron probe microanalyzer to analyze the interface of the composite material, it can be observed that the titanium element presents a gradient distribution. It shows that the preparation process of the present invention is good, and gradient composite materials can be prepared.

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PUM

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Abstract

The invention discloses a preparation method of a heat-insulating ceramic phenolic resin-based gradient composite material. Fiber cloth is used as a reinforcing phase, and the fiber cloth is respectively dipped in different gum dipping solutions with the phenolic resin as a matrix and contents of ceramic components and hollow microbeads in gradient distribution to prepare a prepreg; laminating, die pressing and thermal curing molding at 150-200 DEG C to obtain the gradient composite material comprising a heat-proof layer, a gradient transition layer and a heat-insulating layer. When the temperature of the gradient composite material is as high as 1000 DEG C, the heat-proof layer can be converted into a ceramic phase with higher strength and can resist heat flow erosion; the gradient transition layer can relieve stress concentration and reduce stress; and hollow microspheres are added to guarantee that the heat-insulating layer has good thermal matching performance.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a method for preparing a heat-insulating ceramizable phenolic resin-based gradient composite material. Background technique [0002] Gradient material is a kind of composite material whose composition and microstructure change continuously in space, and the performance of the material presents a gradient change. Compared with traditional composite materials, due to the continuous and smooth transition between the phases that make up the gradient material, when the gradient material is added between the interfaces of two different materials, the problem of thermal mismatch between the material interfaces can be greatly reduced Mitigation, so as to avoid the peeling failure of the whole material at the interface of different materials. [0003] At present, there are many kinds of preparation techniques for preparing gradient materials, such as the gradient / ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/14C08L61/06C08K7/28C08K7/24C08K3/00C08K7/10C08K7/06C08J5/24
CPCC08J5/24C08J2361/14C08J2461/06C08K3/00C08K7/06C08K7/10C08K7/24C08K7/28
Inventor 黄志雄季亦同丁杰杨滔杨威秦岩
Owner WUHAN UNIV OF TECH
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